System and method for providing assistance data within a...

Details System and method for providing assistance data within a... System and method for providing assistance data within a...

2004-08-04

2008-12-16

Phan, Dao L (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S356000

Reexamination Certificate

active

07466264

ABSTRACT:
A system and method for providing assistance to a position receiver in a location network consisting of a Global Navigation Satellite System (GNSS) and a synchronized network of positioning-unit devices is disclosed. A positioning-unit device observes the time and frequency of received Global Navigation Satellite System (GNSS) signals relative to the synchronized network of positioning-unit devices. These time and frequency observations are modulated, as assistance data, onto the positioning signals that are broadcast by the positioning-unit devices. A position receiver demodulates the assistance data and analyzes the positioning signals. The position receiver then searches for Global Navigation Satellite System (GNSS) signals in a range responsive to the assistance data and the analysis of the received positioning signals.

REFERENCES:
patent: 6380891 (2002-04-01), Yamashita
patent: 2004/0183723 (2004-09-01), Bhatia et al.
patent: 2005/0253754 (2005-11-01), Mizuochi et al.
patent: 2006/0055596 (2006-03-01), Bryant et al.

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